Metal column



UNITED STATES PATENT OFFICE.

EDWARD M. BUTZ, OF ALLEGHENY, PENNSYLVANIA.

METAL COLUMN, PILASTER, OR GIRDER.

SPECIFICATION forming part of Letters Patent No. 304,789, dated September 9, 1884.

Application filed January 10, 1884. (N0 model.)

To all whom it may concern;

Be it known that I, EDWARD M. BUTZ, a citizen of the United States, residing at Allegheny, county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in Metal Columns, Pilasters, or Girders; and I do hereb declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in whichlike letters indicating like parts Figurel is a perspective section of a column embodying my invention Fig. 2, a plane transverse section through the same; Fig. 3, a perspective section, on an enlarged scale, of the main front plate; Fig. 4, a plane transverse section through the same; Fig. 5, a perspective section, on an enlarged, scale, of one of the corner plates; and Fig. 6, aplane transverse section through the same.

My invention relates to the construction of metal supporting members for buildings, bridges, and other structural uses; and my improvement consists in a series of rolledmetal plates, of shape or section herein shown and described, united by bolts or rivets, and constituting a composite column, pilast-er, or girder. I

To carry out my invention I form of rolled iron or steel a main front plate, a, a pair of corner plates, a, a pair of side plates, a and a back plate, (L The main front plate, a, has in transverse section the form of a hollowbacked tongue, face, or rib, with a flange at each side thereof, said flanges being in line one with the other. Said plate does not, per se, constitute part of my present application, and is set forth andclaimed in another application for Letters Patent by me, of even date herewith, marked Case M. The side plates, 0. are of the form usually termed channeliron-that is to say, a plane body portion with a perpendicular flange at each of its sides, or a semi rectangular section. The back plate, a is plane and without flanges from end to end; and the corner plates, a, are formed of a plane body, with flanges turned in opposite directions, respectively, projecting from its sides.

In the format-ion of a composite column, pilaster, or girder, the corner plates, a, are first riveted or bolted to the flanges of the main front plate. The side plates, a with their flanges turned outward, are next similarly secured to the opposite flanges of the corner plates; and, finally, the back plate, a, is riveted or bolted to the flanges of the side plates farthest from the corner plates.

A series of lattice bars or plates may, if desired, be substituted for the back plate, a, as a mechanical equivalent therefor, in the construction of the column.

My invention is particularly applicable to use in the construction of pilasters for wroughtmetal fronts for buildings, in which case the face of the front plate may be rolled intoa raised or depressed ornamentation, and a base and capital may be attached thereto. The flat sides and back afford surfaces for the suitable and convenient connection of lateral memhers.

I claim herein as my invention- A rolled-metal column, pilaster, or girder composed of a main front plate having slde flanges, a pair of corner plates, as descr1bed, connected to the flanges of the front plate, a pair of side plates connected to the opposite flanges of the corner plates, and a back plate connecting the opposite flanges of the side plates, substantially as set forth.

In testimony whereof I have. hereunto set my hand.

EDVARD M. BUTZ. 

